Five inches of quickly falling snow on Thursday caused dozens of accidents across Duluth, including a multi-car crash that closed a stretch of Interstate 35 for hours.

The crash happened in one of the tunnels along the edge of downtown Duluth and forced the highway to close at 11:30 a.m. The highway re-opened around 3:30 p.m. Thursday.

The I-35 tunnels near downtown can be dangerous, said Duluth Deputy Chief Mike Tusken. "Any time you get a vehicle stopped in there, often times another driver coming won't see the accident until they come around a turn, and often times it's too late to stop."